| 摘要 |
FIELD: emitting electron beams for extracting polluting components from stack gas. SUBSTANCE: device has electron beam emission source, acceleration tube for accelerating electrons emitted from mentioned electron emitting source, focusing electromagnet for superimposing magnetic field onto high-energy electron beam produced by means of acceleration tube to control diameter (sectional area) of electron beam, and electromagnet for deflecting and sweeping adjustable-diameter electron beam by superimposing magnetic field onto electron beam, electric current component IF, of this magnetic field being synchronized with electric current IS of focusing electromagnet electric current IF superimposing of focusing electromagnet, with the result that focusing electromagnet current IF is adjusted so as to ensure that mentioned diameter (sectional area) of electron beam were at maximum in sweep maximum points. EFFECT: provision for eliminating problem of electron beam convergence at beam maximum sweep points and for obtaining emission zone with constant energy density. 4 cl, 7 dwg
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